Illuminated malfunction indicator lamp (MIL) with diagnostic trouble code (DTC) P20A5 stored in the...

Bulletin number

TSB 24-2055

Component

Power train: manual transmission: control module (TCM/PCM/tecm)

Summary

Some 2023 F-Super Duty vehicles equipped with a 6.7L engine may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble code (DTC) P20A5 stored in the powertrain control module (PCM). This may be due to the software in the glow dosing module (GDM) and does not affect vehicle operation. Due to on-board diagnostic (OBD) functionality, the GDM may be referred to as the secondary OBD control module (SOBDMC) in the Ford Diagnosis and Repair System (FDRS) scan tool.

Owners of these vehicles have filed 11 complaints in the transmission category.